Monitor viral Reddit posts and send GPT-4o-mini summaries to Telegram

Who's it for

This workflow is perfect for:

Content creators who need to stay on top of trending topics Marketers tracking industry discussions and competitor mentions Community managers monitoring relevant subreddits Researchers gathering trending content in specific niches Anyone who wants curated Reddit updates without manual browsing

What it does

This automated workflow:

Monitors multiple subreddits for viral posts daily Filters posts based on engagement metrics (upvotes and recency) Generates concise AI summaries of trending content Delivers formatted updates directly to your Telegram chat Runs completely hands-free once configured

How it works

Step 1: Configuration & Scheduling Triggers daily at 8 AM (customizable) Loads your configured subreddit niches and Telegram settings

Step 2: Data Collection Loops through each subreddit in your niche list Fetches the 50 newest posts from each subreddit Extracts key data: title, URL, upvotes, timestamp, subreddit name

Step 3: Smart Filtering Applies viral post criteria: Posts with 500+ upvotes, OR Posts with 70+ upvotes created within the last 24 hours Ensures only high-engagement content passes through

Step 4: AI Summarization Aggregates all filtered posts into a single batch Sends to GPT-4o-mini for analysis Generates concise 100-200 word summaries Formats output for Telegram markdown

Step 5: Delivery Sends all summaries to your Telegram chat Includes post links and engagement metrics Delivers in a clean, readable format

Setup steps

1. Configure Reddit credentials Connect your Reddit OAuth2 API credentials in the "Get Reddit Viral Posts" node Ensure you have API access enabled on your Reddit account

2. Configure Telegram credentials Add your Telegram bot token in the "Send to Telegram" node Get your chat ID by messaging your bot and checking updates

3. Customize your niches Open the "Workflow Configuration" node Edit the niches array with your target subreddits Default niches: technology, programming, science, gaming

4. Set your Telegram chat ID Replace the default chat ID (7917193308) in "Workflow Configuration" Use your personal chat ID or group chat ID

5. Adjust the schedule (optional) Modify the "Daily 8 AM Trigger" to your preferred time Change frequency if you want multiple updates per day

6. Test before activating Run the workflow manually using the "Test workflow" button Verify summaries arrive in Telegram correctly Check that filtering logic works as expected

Requirements

Required credentials: Reddit OAuth2 API access (free) Telegram bot token (free via @BotFather) OpenAI API key for GPT-4o-mini (paid)

Platform requirements: n8n instance (self-hosted or n8n Cloud) Active internet connection Sufficient API rate limits for your usage

Technical knowledge: Basic understanding of n8n workflows Ability to generate API credentials Familiarity with Telegram bots (helpful but not required)

How to customize

Adjust subreddit monitoring: Add or remove subreddits in the niches array Format: ["subreddit1", "subreddit2", "subreddit3"] Example: ["machinelearning", "datascience", "artificial"]

Modify viral post criteria: Edit the "Filter" node conditions Change upvote thresholds (default: 500+ or 70+ within 24h) Adjust time window for recency checks

Customize AI summaries: Update the system prompt in "AI Summarizer" node Change summary length (default: 100-200 words) Modify tone, style, or focus areas Switch to different OpenAI models if needed

Change scheduling: Modify trigger time in "Daily 8 AM Trigger" Options: hourly, twice daily, weekly, custom cron Consider API rate limits when increasing frequency

Adjust data collection: Change the limit parameter in "Get Reddit Viral Posts" Default: 50 posts per subreddit Higher limits = more comprehensive but slower execution

Enhance filtering logic: Add additional criteria (comments count, awards, etc.) Create category-specific thresholds Filter by post type (text, link, image)

Format Telegram output: Modify parse_mode in "Send to Telegram" node Options: Markdown, HTML, or plain text Customize message structure and styling